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In this study, the safe and convenient device for vapor pressure measurement of water and ethanol in school was developed and measurement method using this device was studied. The device was simply composed of general-purpose press guage and a syringe. Removing the internal air of the connector joining the syringe and the pressure guage increased the measurement accuracy since this process made of inside the syringe single system. After the vapor pressure of water and ethanol were measured with this device from 25 °C up to 80 °C, the accuracy of the device was verified comparing with values in references. It is expected to be helpful for conception learning in school because the easy, safe and individually accesible experiment of vapor pressure is possible using this device.

A Method Measuring Vapor Pressure of Liquid Using Syringe and Pressure Gauge from 25 ℃ up to 80 ℃